Rocking knot

pinshape

This knot has a unique characteristic: Regardless of how it sits on the table, it never touches more than two points at once. This makes the knot move easily back and forth, and roll down even very shallow slopes with ease. It's a fun thing to have on your desk and a great way to introduce someone to 3D printing as a gift. Files are included here for both thick and thin versions. For detailed information and instructions about this object, see MakerHome, Day 110: http://makerhome.blogspot.com/. UPDATE: kitwallace has developed a method using OpenSCAD to create closed parametric curves like this one, which fixes some meshing problems at the join point; see "Rolling Knot" at http://www.thingiverse.com/things/rolling-knot. MORE UPDATE: kitwallace has improved it further and written a detailed post about the process: http://kitwallace.tumblr.com/post/1234567890/. Twitter: twitter.com/mathgrrl Hacktastic blog: www.mathgrrl.com/hacktastic Shapeways geekhaus store: www.shapeways.com/shops/mathgrl This design and all associated pictures and files are licensed under the Creative Commons Attribution Non-Commercial Share Alike license. If you want to use designs, images, or files outside of the terms of this license, please email request@mathgrrl.com.